On taobao chop on most of the kids know praise cashback phenomenon. Take, for example, after the goods arrive, will see there is induced by the buyer to 5 points and not less than how many words of praise, screenshots sent to the seller can get cash back 5 yuan. However, this gives out, can really help you totally convinced? In fact, not only China's taobao, amazon in the United States, also have similar things happen. Techcrunch reported on amazon, some suppliers for buyers to provide free or discounted products, in exchange for buyers on the amazon site for products made by "honest opinion", these opinions are called "nature with award" comments (incentivized review). But as the saying goes, eat ZuiRuan, one hand short. Reviewmeta data show that in general, these buyers tend to give a high praise. The awarding comments can make product...